you find out that it takes 2 sec. for the swing to complete one cycle. what is the swing`s period and frequency?

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Accepted Answer

The time it takes "to complete one cycle" is a perfect definition for period.So the 2 sec that you measured is the swing's period.Frequency is just   1/period  (the 'reciprocal' of the period).For this swing, the frequency is   1/(2sec)  =  0.5 per second = 0.5 Hz. ( "Hertz" means "per second")

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